ADDITION/ ALTERATION AND SPECIAL REPAIRS TO SAILORS MARRIED ACCOMODATION (R-4, R-14, R-30 AND R33 BUILDINGS) AT RS COLABA, MUMBAI

(a) Height upto and including 4th floor.

(b) 5th floor to upto and including 8th floor.

(c) 9th floor to upto and including 12th floor.

(d) 13th floor to upto and including 16th floor.

Relieving structural members such as columns, beams, and slabs of their superimposed loads, either partially or fully, by providing adjustable steel props, frames, etc., including necessary timber runners, bracing, jacking arrangements—complete in all respects to the satisfaction of the Engineer-in-Charge. Note: Removal and reconstruction of brickwork, if required, shall be paid for separately. Work to be carried out at G+14 bldg including top roof, parapet and shaft walls with scaffolding & safety measures.

Chipping off existing loose and damaged concrete from RCC members, including all affected RCC columns, beams, slabs, and chajjas on both external and internal facades, beyond the main reinforcement (if deemed necessary by the Consultant), carefully using a chisel and hammer. Providing and applying ‘Rusticide SS’ rust passivator (or equivalent, as specified in the approved brand list) to existing reinforcement bars, including wire brushing of the reinforcement, cleaning, and washing of the concrete surface—complete as directed. Providing and applying two coats of rust preventor slurry, prepared using “Polyalk Fixoprime” or equivalent (as per specified brands) and cement in the ratio 1:1.5, on the existing reinforcement bars as directed. Providing and applying a bonding coat of slurry, prepared with “Polyalk EP” or equivalent (as per approved brands) and cement in the ratio 1:1, over the concrete and reinforcement substrates—complete as directed. Subsequently, providing and applying Polymer Modified Cement Mortar using “Polyalk EP” or equivalent, in the specified mix proportion 1:5:15 to RCC members, including hand packing, proper curing, and preparing the surface with a rough finish for further plastering. Note: Work to be carried out at G+14 bldg including top roof, parapet and shaft walls with scaffolding & safety measures.

Opening of separation cracks at the junctions of RCC and masonry, wherever directed, by cutting into 'V'-shaped grooves measuring approximately 2” to 3” on either side of the crack. The work shall include careful marking of the areas to be opened using a cutting machine, followed by skillful and cautious chiseling using a well-sharpened chisel and hammer, as instructed. The prepared surfaces shall be cleaned by wire brushing and thoroughly washed using a water jet on both concrete substrates and masonry walls. All operations are to be carried out to the entire satisfaction of the Consultant, as per instructions. Note: Work to be carried out at G+14 bldg including top roof, parapet and shaft walls with scaffolding & safety measures.

Moistening of cracks, followed by the application of a priming/bonding coat made of “Polyalk EP” and cement (or equivalent as specified in the approved list of brand names) in the ratio of 1:1 on the prepared surfaces, as instructed and directed. Subsequently, the cracks/grooves shall be filled by providing and applying Polyalk EP polymer-modified cement mortar (or equivalent), mixed in the proportion 1:5:15 (Polyalk EP : Cement : Graded Sand/Quartz Sand) on the prepared surfaces. The surface shall then be finished flush with the existing plaster, including hand packing, curing, and matching the finish to the external plaster using wooden floats, punches, etc., complete in all respects, as specified and directed. Note: Work to be carried out at G+14 bldg including top roof, parapet and shaft walls with scaffolding & safety measures.

Drilling holes of required size, up to 16 mm in diameter and up to 50 mm in depth, in concrete at specified locations, including thorough cleaning of the drilled holes as directed. Note: Work to be carried out at G+14 bldg including top roof, parapet and shaft walls with scaffolding & safety measures.